NetRad: Daily Net Radiation

Description Usage Arguments Author(s) Examples

Description

Daily net radiation [kJ m-2 d-1]

Usage

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NetRad(lat, Jday, Tx, Tn, albedo = 0.18, forest = 0, slope = 0, 
aspect = 0, airtemp = (Tn+Tx)/2, cloudiness = "Estimate", 
surfemissivity = 0.97, surftemp = (Tn+Tx)/2, units = "kJm2d", 
AEparams=list(vp=NULL, opt="linear"))

Arguments

lat

latitude. Default is radians, but will automatically convert from degrees if value is larger than pi/2 or less than -pi/2

Jday

Day of the year [-]

Tx

Max temperature [C]

Tn

Min temperature [C]

albedo

Albedo (0-1) [-]

forest

Forest canopy or shade cover (0-1) [-]

slope

Slope [radians]

aspect

Ground aspect [radians from north]

airtemp

Average air temp [C]

cloudiness

Cloudiness percentage (0-1) [-] Default value will estimate cloudiness based on daily temperature difference.

surfemissivity

Surface emissivity [-]

surftemp

Surface temperature [C]

units

Units of the result. Defaults to "kJm2d" which returns result in kJ/m2/d, the other option is "Wm2", which will make output in W/m2

AEparams

Atmospheric Emissivity options. Defaults to linear approximation. To use Brutsaert option, include vapor pressure values (kPa)

Author(s)

M. Todd Walter, Josephine Archibald

Examples

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NetRad(42.4*pi/180, Jday=55, Tx=2, Tn=(-3))

Example output

Loading required package: operators

Attaching package: 'operators'

The following objects are masked from 'package:base':

    options, strrep

Loading required package: topmodel
Loading required package: DEoptim
Loading required package: parallel

DEoptim package
Differential Evolution algorithm in R
Authors: D. Ardia, K. Mullen, B. Peterson and J. Ulrich

Loading required package: XML
[1] 3774.8

EcoHydRology documentation built on March 29, 2021, 3:01 p.m.